Question

What is the meaning of the NULL value in databases?

Select one:

a. Absence of information.

b. You cannot safely overwrite this value.

c. Everything you write in this data field will become NULL.

d. No user can access this value.

e. Division by this value will result in catastrophic data loss.

In databases, what types of locks do exist.

Select one:

a. Tight and loose locks.

b. Explicit and implicit locks.

c. Secure and unsecure locks.

d. Small and large locks.

e. Encased and open locks.

What happens if a bucket runs out of memory space but still receives more data?

Select one:

a. It explodes.

b. It malfunctions.

c. It overflows.

d. It begins to shake violently.

e. It dumps.

Answer 1

*NOTE: Drop a comment for querries.